The Temperature Check category collects all temperature check polls for formal proposals.
From the community voted governance process proposal (MuesliSwap Governance Process - Discussion):
Before an official off-chain vote is performed, a temperature check is conducted on the MuesliSwap Governance Forum. This is an informal vote where community members can show their support or opposition to the proposal. If more than 20 accounts agree that the proposal should go into voting, an official off-chain vote will be performed.